alpha beta, beta gamma-dimethylenedeoxythymidine 5'-triphosphate

[hydroxy-[[hydroxy-[[(2R,3S,5R)-3-hydroxy-5-(5-methyl-2,4-dioxo-pyrimi din-1-yl)oxolan-2-yl]methoxy]phosphoryl]methyl]phosphoryl]methylphosph onic acid